Flue-cutter.



S. T. BYD. FLUE GUTTER. urmunon rum 1120.26. nos.

920,254. Patented May 4, 1909. 2 SHEETS-SHEET l.

By STBog/d I 5W A TTORNE Y 2 SHEETS-SHEET 2.

Patented May 4, 1909.

S. T'. BOYD. FLUE GUTTER. urmummu Hmm mxo. as, nos.

V. w ma N ffl/1! .S M l,

UNITED SLEMMONS T. BOYD, 0l" SLUAN, IOWA.

FLUE -CUTTER.

Specification of Letters Patent.

Patented May 4, 1909.

Application filed December 26, 1908. Serial No. 469,398.

To all ywhom it may concern,.-

Be it known that l, SLEMMoNs T. Born, a citizen of the United States, residing at Sloan, in the county of Voodbui-y and State of Iowa, have invented certain new and useful Im )rovements in lilueutters, of which the following is a s eciiication.

My invention rc ates to means for cutting flues and the object is to provide a machine which can be readily ad`usted to the iiues and will cut them quickl and thoroughly for removal from the boiler or other p ace where situated. I accomplish this object by the construction shown in the accompanying drawing in which- Figure 1 is a front view, Fig. 2 a plan view and Fig. 3 an inverted rear view of my invention complete. Fig. 4 is a longitudinal section on line 1-1, Fig. 1, the levers being shown complete. Fig. 5 is a cross-section on line 2 2, Fig. 4, inverted, showin also the buttons for enlarging the jaws on t e clamp.

In the drawing A is a round shaft the principal part of which is hollow and contains the cutter levers, while the outer end is solid and threaded. B, B, are the levers pivotally secured to the shaft and its lining B', by bolts a, a, which pass through the lining and enter the shaft. The lining is in two parts, the edges of each piece forming bearing surfaces for the levers and holding the levers to operation in the same plane. The rojecting ends of the levers slant inwardly in their normal position to give the rolling cutters C, C, a straight bearin surface. The cutters are removably secure to the levers by screw bolts b, b. Different sized cutters may be adjusted and used, accordin to the size of the ues. The o posite en s of the levers are bowed u war ly, pro'ectin through the slots a in t e sides of t e ho low shaft A. They are normally held a art by a flat spring D secured at one end) to one of the levers by a screw holt c. The front end of the shaft is supported in a rounded opening in a frame E, an internal rim c', secured to the shaft formin a bearing surface. The shaft is o erated y a handle F which freely incloses t e shaft and has a ratchet d adapted to engage the teeth of a rim G which is secured to the shaft close to the handle. The feed or adjustment of the cutters is regulated b a thimble H having internal threads e a apted to mesh with the threads of the shaft. The other part of the thimble is hollow and fits over the shaft A, pressing upon the levers B. As the levers are )rcssed into the shaft and there held by the t iimble the opposite ends are opened and the cutters forced against the inside of the flue.

The shaft is turned by the lever F which rotates on the shaft, the thimble Il being held stationary during the cutting process and the ratchet gripping the rim G and held in place by a spring f. The small end of the shaft is squared internally, as seen in Figs. 3 and 4, for the reception of a rod connected with electric or other motive power, if other than hand power is employed.

I will now describe the clamp for holding the cutter in place while in o eration. At the end of the frame opposite t 1e cutters are four lateral slots, g, h, t' and y', in order named, from top to bottom. The upper and lower slots, 1 and j, are of the same size and narrow. The sl/ot h is wider than both g and j, and the slot t' is wider than all the rest. In the slot 7a` is secured a xed upper' jaw I by a cross piece c screwed to the rear end of the aw. A movable lower jaw J is pivoted to the upper jaw by side pieces, Z, l, removably secured thereto, and ro'ects through the slot i between brackets The latter are secured to the frame by bolts and nuts m., m, through the slots g and The brackets each have arallel vertical s ots, as seen in Fig. 5, and t e rear end of the lower aw is secured between the brackets by a olt n which passes freely throu h the jaw and slots and 1s verticall f movable in the slots. Directly below the ower jaw a lever L is pivotally secured between the brackets by a bolt o assing through the end of the lever an the brackets. The jaws constitute a clamp to secure the cutting machine to one of the iues while the flue adjacent is being cut. The jaws are first inserted in the flue, then the lever is pressed down, which raises the rear end of the lower jaw, depressing the forward end and wedging the jaws in the flue. The lower corner of the lower jaw is removed to make the insertion easier and to give a firmer bearing surface. The lateral slots are provided in order to adjust the clamp to flues at dilTerent distances from each other. By loosening the bolts m securing the brackets and the screw in the piece 7c, the jaws may be slipped in the slots and then secured in the desired places. The jaws are each provided with threaded holes 1n their opposite edges and may be enlarged to fit larger flues by securing the buttons M,

M, to the upper and lowei edges by screw bolts p, p. The clamp holds the cutter firmly in its place while the work of cutting the adjacent flue progresses.

Having described my invention, what I claim as new and desire to secure by Letters Patent, is-

1. In a flue-cutter, the combination with a frame and an o )erating handle, a shaft rotatably supporte in the frame and operated by the handle, cutters secured to the shaft and operated thereby, of jaws adjustably secured in thel frame and adapted to be inserted in an adjacent flue, and a lever pivoted to the frame for spreading the jaws and securing a clamp in the Hue, substantially as described.

2. In a flue-cutter, the combination with a frame and operating handle, a hollow shaft rotatably su )ported in the frame and operated by the liandle, levers pivotally secured in the shaft, knives or cutters secured to said levers and means applied to the levers for regulating the feed o-r adjustment of the cutters, of jaws adjustably secured in the frame and adapted to be inserted in a flue, and a lever pivoted to the frame for spreading said jaws and securing the cutter durin the cutting process, substantially as descri ed.

3. In a flue-cutter, the combination with a supporting frame and means for operation of the shaft, a hollow shaft rotatably su ported in the frame, levers pivotally secured) to the shaft, knives secured to the levers and adapted to enter the flue, the levers being bent or frame, the clamp consistingl bowed outwardly near the opposite ends, a thimble to press over the ends to force the two ends of the levers together and adapted to regulate the feed or ad'ustlnent of the knives, of a clamp adjustabl of two jaws, one of said laws being in a fixe position and the other of said jaws being Jivoted in the frame, the jaws being adapted for insertion in an adjacent flue, and a lever pivoted to the frame for spreading the movable jaw with reference to the fixed jaw, substantially as described.

4, In a flue-cutter, the combination with a frame and means for the operation of the shaft, of a hollow shaft rotatably su ported in the frame, and having slots in t e sides thereof, a portion of the shaft being threaded, bent levers pivotally secured in the shaft and ada ted to project through the slots thereof, nives or cutters secured to said levers, and a thimble inclosing the shaft adjustable on the threads of said shaft to force the outer ends of the levers together and adapted to regulate the feed or adjustment of the knives, and means for securing the cutter to an adjacent flue durin the euttinlg process, substantially as descri ed..

n testimony whereof I have hereunto affixed my name in the presence of two witnesses.

SLEMMONS T. BOYD. In the presence of- DAVID FonsY'rH, R. Z. MITCHELL.

y secured in the 

